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以7个核桃品种为试材,在攀枝花市1 800~2 500 m范围内以每150~250 m为1个海拔梯度进行区域试验,采用主成分分析法,研究不同海拔区域内适宜发展的核桃品种。结果表明:前3个主成分代表其全部综合性状88.41%的信息,从而确定了代表树体生长量性状的3个重要主成分;通过创建综合评价模型,对7个核桃品种在不同海拔区域的生长表现进行排序,表明在攀枝花市1 850 m海拔区域可选择‘大泡核桃’‘小圆菠萝’‘三台核桃’‘大圆菠萝’‘攀核1号’等品种,2 100 m海拔区域可以选择‘攀核1号’,2 250 m海拔区域可以选择‘大圆菠萝’,2 425 m海拔区域可以选择‘小圆菠萝’和‘大圆菠萝’。
Seven walnut cultivars were used as experimental materials to conduct the regional experiment at an elevation gradient of 150 ~ 250 m in an area of 1 800-2 500 m in Panzhihua City. Principal component analysis was used to study the suitable development of walnut in different elevations Variety. The results showed that the first three principal components represented 88.41% of the total traits, and thus identified three important principal components that represent the growth traits of the tree. By establishing a comprehensive evaluation model, the genetic diversity of seven walnut cultivars at different altitudes The results showed that in the area of Panzhihua 1 850 m above sea level, it is possible to choose varieties such as “big bubble walnut”, “small round pineapple”, “three walnut”, “big round pineapple”, “Pan1” Select ’No. 1 Panpan’, choose ’Big Pineapple’ at 2,250 m above sea level, and ’Round Pineapple’ and ’Big Pineapple’ at 2 425 m above sea level.